Question 408571 in Javascript Question posted in
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Javascript – Loading a worker script at build time in a Vite project

Is it possible to create define a web worker such that it does not have to load from an external file during runtime in a vite project?
I am building a browser that depends on a web worker file and I want to build into one index.js asset file that can be used outside of the project. The problem is that I will need to deploy the index.js asset file along with the web worker file since it is being loaded through the URL.
Is there away to allow the web worker’s logic to be included into the final index.js file such that it can be defined and loaded from within the same index.js asset file?

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2

Answers


  1. Chosen as BEST ANSWER
    0

    I have just found another solution to this problem using vite's inline worker import: https://vitejs.dev/guide/features.html#import-with-query-suffixes

    This way, vite can compile the worker file and add it automatically into the final bundle asset.


  2. 0

    Imagine you have a web worker’s code, but instead of keeping it in a separate file, you want to tuck it neatly inside your main JavaScript file. This way, when you build your Vite project, everything gets bundled into one convenient package.

    const workerCode = `
  self.onmessage = (event) => {
    const result = event.data * 2; 
    self.postMessage(result);
  };
`;

const blob = new Blob([workerCode], { type: 'application/javascript' });
const workerUrl = URL.createObjectURL(blob);

const worker = new Worker(workerUrl);

worker.postMessage(5);

worker.onmessage = (event) => {
  console.log('Received from worker:', event.data);
};

worker.terminate();
URL.revokeObjectURL(workerUrl);
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